Grinder.



C. R. BUTTON.

GRINDER. APPLICATION FILED MAR. s, 1913.

1,Q87,527. Patented Feb. 17, 1914 A 5-- i c 3 29 27 40 am: I 25' 10 20 14 21 an 28 14 11 Jhvenzov CHARLES R. BUTTON, 0F WORCESTER, MASSACHUSETTS.

GRINDER.

Specification of Letters Patent.

Patented Feb. 17, 1914.

Application filed March 8, 1913. Serial No. 752,821.

ToaZZ whom it may concern Be it known that I, CHARLES R. BUrroN, a citizen of the United States, residing at Worcester, in the county of lVorcester and and in which the tool can be held firmly in any desired position relative to the grinding wheel; in which the grinding wheel can be caused to move longitudinally of the work;

in which the mechanism for producing the longitudinal motion can be thrown out of operation so as to permit the operator to move the blade along the wheel instead of having the wheel move along the blade; in which the blade will be held firmly and securely and can be adjusted to any desired angle with respect to the wheel'so as to provide for grinding a blade in which the edge makes an angle to the back; also to provide a simple and effective device for moving the blade along the wheel by hand, either parallel with the stone or at an angle thereto;

to provide a simple arrangement by which the blade can be turned through small angles automaticall merely by moving the blade holder longitudinally; and to provide .an improved form'of brackets for holding the blade holder and an improved form of blade holder.

Further. objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanyin drawings in which,

Figure l is a plan of a preferred embodiment of the invention showing it in operation; Fig. 2 is a similar plan of a part of the mechanism showing one way in which the mechanism can be adjusted; Fig. 3 is a transverse sectional view on the line 33 of Fig. 1; and Fig. 1 is an end view showing the parts in another adjusted position.

The invention-is shown in the form of a simple machine embodying a main frame 10 having a bracket 11 and bolt 12 for securing it to a table, window sill or the like. On this frame are end pieces 13 provided with screws 14 extending inwardly from the outside and adjustably fixed to the end by nuts 15. On these screws is supported a main square shaft 16 having holes in the end for receiving the screws. It will be seen, there fore, that the shaft is readily dismountable and that the screw can be adjusted to take up wear, and that when adjusted the screws are stationary and the shaft turns upon them.

The shaft is provided with a pinion 17 designed to be operated by a gear 18 having a handle 19 and mounted to turnon an extension 20 on the frame. A guard 21 is shown for the pinion. On the square shaft 16 is the hub 22 of a grindin wheel 23. This hub has a square passage tfierethrough and the wheel is free to move along the shaft and of course turns with it. The hub is provlded with a circumferential groove 24.

Mounted on the end pieces in a way'similar to that described for the shaft 16, is a screwthreaded shaft 25. Means is provided for transmitting motion of rotation from the shaft 16 to the shaft 25.-'-This means is capable of being readily disconnected and is shown in the present instance as comprising two grooved pulleys 26 and 27, one on'each shaft, and a belt 28 for connecting them. The screw-threaded shaft 25' is provided with a nut 29 which has ayoke 30 extending into the groove 24 of the hub 22.

The operation, of the parts so far described will lie obvious. The rotation of the gear lit rotates the shaft 16 at a high speed and also the shaft 25 when the belt is in position. This causes the wheel 23 to rotate at 'a rapid rate and causes it to travel back and forth along the shaft so as to traverse a blade from'end to end.

For the purpose of supporting the blade the following devices are shown: On the back of the frame 10 are a pair of integral upward projections 35 to each of which is pivoted an arm 36, this arm being free to swing forward and back through a wide are. On the end of this arm is pivoted a second arm 37, also pivoted to swing through a wide arc. The adjustments of these arms will be indicated in a general way by comparison of Figs. 3 and 4c. The pivot points are made in such a way as to prevent the turning of the arms on any axis except the freely passes a rod 89, this rod being supported by the two arms. As the two pairs of arms are adjustable independently of each other, the rod can be turned to various positions; that is it can be turned from the position shown in Fig. l, in which it. is parallel with the shafts, to various positions in which it makes an angle to the shafts, as

for example that shown in Fig. 2, and one 0 end can be made higher than the other if desired. The rod is provided with a handle 40 for operating it and it is also provided with a guide in the form of a blade 41 having a bottom guiding edge at an angle to the rod 39. This is held on the rod by a nut 42 and can be adjusted to any desired position. On the rod is a work clamp shown as com prising a lower member 45 having a bottom and integral upwardly extending sides made of sheet metal, and a top part 46 having a top and integral downwardly extending sides fitting between the sides of the member 45 and also made of sheet metal. At the front end these parts are provided with teeth 47 constituting jaws for clamping the work. The sides of the two parts 45 and 46 are provided with registering perforations for the rod 39. At the rear this clamp is provided with a screw 48 and a nut 49 located between the downwardly extending sides of the part 46. The screw extends through openings in the two parts 45 and 46.

In operation the blade to be operated upon is placed between the jaws 47 and the screw 48 tightened up after the blade is adjusted to approximately the right position relatively to the grinding wheel. The tightening of this screw not only tightens the blade in position, but it also exerts controlling pressures on the walls of the passages in the sides of the parts 46 and so as to clamp the work clamp on the rod 39. This having been accomplished, the rod can be adj ust-ed more accurately to the desired position and 45 then the machine operated in any desired Way. If the blade to be sharpened is a straight one, the rod is adjusted to the proper position and then the wheel 18 is turned, moving the grinding wheel back 50 and forth along the straight edge of the blade. If it is found that. the blade is not in exactly the proper position, it is not neces sary to resort to the proper placing of the arms 36 and 37 it they are approximately accurate, as the guide 41 can be tightened up in position to rest on one of the arms 37 and then the rod 39 can be moved longitudinally toward the blade. As the turning of the rod in its own axis is limited by the guide 4] resting on the arm 37 it will be seen that the movement of the rod longitudinally will cause the rod to be turned slightly on account of the incline of the lower surface of this guide. This adjusts the angle of the 05 blade to the grinding wheel accurately and often desirable to dispense with the feed by throwing off the belt 28 and to loosen the guide 41. In this case the operator can simultaneously feed the blade and adjust it to the wheel. It will be seen, therefore, that an exceedingly simple and inexpensive construction is provided and one in which the .length of the machine is substantially equal to the length of the longest blade which it is desired to sharpen in spite of the fact that an effective feed is provided; also that the device is capable of almost universal adjustment and a wide range of use in the ordinary kitchen.

Although I have illustrated and described only one form of the invention, I am aware of the fact that many modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to all the details of construction herein shown and described, but

What I do claim is 1. In a grinding device, the combination with a grinding wheel, of a pair of adjustable supports adjacent thereto, a rod carried by said supports and movable longitudinally therein, said rod having a handle for operating it, and a work-holder mounted on said rod and comprising a pair of members each mounted to freely rotate on the rod and having cooperating jaws for engaging the work, and means for simultaneously clamping said jaws on the work and clamping them to said rod whereby the work-holder will move with the rod.

2. In a grinding machine, the combination with a longitudinally movable and rotatable rod, of a pair of jaws each rotatably mounted on the rod and having means for clamping the work between them, and means for simultaneously clamping the jaws upon the work and securing them fixedly to the rod. L

3. A work-holder for a grinding machine or the like comprising a rod, a pair of jaws through which the rod passes, said jaws being pivotally mounted on the rod, and a screw for forcing the rear ends of said jaws apart so to clamp the work between the opposite ends of the jaws and at the same time clamp the jaws to the rod.

4. As an article of manufacture, a work holder for a grinding machine or the like comprising two sheet metal aws, one having a bottom and vertical sides, and the other having a top and vertical sides, said sides being provided with perforations in alinemeal, a rod passing through said perforations for supporting the work-holder, said members having jaws on one side for cooperating with each other to hold the work and means for clamping the jaws together and tightening the members on the rod.

5. In agrinding machine, the combination with a grinding wheel, of a set of brackets adjacent thereto, a rod supported on said brackets and longitudinally movable relatively thereto, and a work-holder on the rod, each of said brackets comprising a pivoted arm, a second arm freely pivoted to the end of the first arm and having means for sup-' porting the rod, said arms being adjustable about their pivots independently of each other, whereby the angle and position of the rod can be varied within wide limits.

'6. In a grinding machine, the combination of a grinding wheel, a pair of arms pivoted to swing on axes parallel with the axis of the wheel, a second pair of arms each pivoted on one of the arms on a parallel axis, the second arms being perforated and a rod supported in the perforations, and capable of moving lo'ngitudinally therein, for supportingthe work. I

7. In a grinder, the combination with a pair of adjustable supports having circular perforations in their ends adapted to be arranged in alinement with each other, a cylindrical rod passing freely through said perforations, a pair of work-holding jaws of said rod, and a guide on said rod for engaging one ofsaid brackets.

8. In a grinding machine, the combination with a grinding wheel, of a longitudinally movable rod adjacent thereto, a work-holder on the rod, and: means whereby when the rod is moved longitudinally the angle of the work-holder with respect to the wheel will be changed.

9. In a grinding machine, the combination of a pair of adjustable brackets, a rod rotatably supported by said brackets and movable longitudinally, a pair' of aws mounted on said rod and movable therewith, and a guide projecting from. one end of the rod and adapted to engage one of said brackets and having a guiding surface at an angle to the rod, whereby as the rod moves longitudi- 11. In a grinder, the combination with a longitudinally movable rod, of a a workholder carried by the rod, means for adjustably supporting the rod, a grinding wheel, and means for simultaneously turning the grinding wheel on its axis and moving it longitudinally with respect to its axis.

12. In a grinding machine, the combination of a shaft, a grinding wheel mounted on the shaft to rotate therewith and capable of moving therealong, said grinding wheel having a grooved collar thereon, a screw threaded shaft arallel with the first shaft, means for rotatlng the screw-threaded shaft from the first named shaft, and a yoke engaging the grooved pollar and having a nut fitting the screw-threaded shaft so as to move therealong. v

13. In a grinding machine, the combination of a frame a square shaft mounted thereon, a rinding wheel mounted on the square shaf t and having a grooved collar, means for rotating the square shaft, a screw threaded shaft parallel with the square shaft above said frame, means for rotating the screw-threaded shaft from the square shaft, a nut on the square shaft, and a yoke extending from said nut and embracing said grooved collar for moving the grinding wheel along the square shaft as it rotates.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

CHARLES R. BUTTON.

Witnesses ALBERT E. FAY,

.CATHARINE I. HAR'rNE'r'r. 

